|Year|Tournament|Venue|Result|Extra|
|---|---|---|---|---|
|2002|European Indoor Championships|Vienna, Austria|5th||
|2003|Universiade|Daegu, South Korea|3rd||
|2004|World Indoor Championships|Budapest, Hungary|1st|2.04 PBi|
|2004|Summer Olympics|Athens, Greece|1st|2.06 NR|
|2004|World Athletics Final|Monte Carlo, Monaco|1st||
|2006|World Indoor Championships|Moscow, Russia|1st|2.02|
|2006|European Championships|Gothenburg, Sweden|5th|1.99 m|
|2006|World Athletics Final|Stuttgart, Germany|4th||
|2006|World Cup|Athens, Greece|1st|1.97|
|2007|World Championships|Osaka, Japan|4th||
|2008|Summer Olympics|Beijing, China|4th|2.01|
|2011|World Championships|Daegu, Korea|4th|1.97|

Question: how many summer olympics has yelena slesarenko participated in?
Answer: 2